MATTRESS COVERS PROVIDE PROTECTION AGAINST DIRT AND CONTAMINATION AND ARE AN EXCELLENT MEANS OF INDICATING THE CONDITION OF THE CONTENTS. MATTRESS BAGS ARE MADE WITH A GENEROUS GUSSET SO THEY SLIP ON EASILY AND ARE AVAILABLE FOR STANDARD AND PILLOW TOP MATTRESSES. CONTAINS VENT HOLES TO REMOVE EXCESS AIR. UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" MADE FROM HEAVY GAUGE MATERIAL FOR OUTSTANDING PROTECTION GENEROUS GUSSET ALLOWS BAG TO SLIP OVER MATTRESS EASILY PACKED ON CONVENIENT ROLLS CONTAINS VENT HOLES